# 题目：回答结果（结构体变量传递）。

class student:
    x = 0
    c = 0


def f(stu):
    stu.x = 20
    stu.c = 'c'


if __name__ == '__main__':
    a = student()
    a.x = 3
    a.c = 'a'
    f(a)
    print(a.x, a.c)
